1220443439 has 2 divisors, whose sum is σ = 1220443440. Its totient is φ = 1220443438.

The previous prime is 1220443423. The next prime is 1220443451. The reversal of 1220443439 is 9343440221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220443439 - 2⁴ = 1220443423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220443489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610221719 + 610221720.

It is an arithmetic number, because the mean of its divisors is an integer number (610221720).

Almost surely, 2^1220443439 is an apocalyptic number.

1220443439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220443439 is an equidigital number, since it uses as much as digits as its factorization.

1220443439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1220443439 is about 34934.8456272530. The cubic root of 1220443439 is about 1068.6591756020.

The spelling of 1220443439 in words is "one billion, two hundred twenty million, four hundred forty-three thousand, four hundred thirty-nine".